president obama said any such attack would trigger american intervention. he called the use of chemical weapons a red line. here is an exclusive interview. watch. >> the red line comment that you made was about a year ago this week. we know there's things that should qualify for crossi iningt red line. >> i've got to say this. when we take action. let's take the example of syria. there are rules of international law. if the u.s. goes in and attacks another country without a u.n. mandate and clear evidence that can be presented then there are questions in terms of whether international law supports it, do we have the coalition to make it work? those are considerations we have to take into account. this latest event is something we have to look at it. keep in mind, because i know the american people keep in mind, we still have war going on in afghanistan. we're still spending tens of billions of dollars in afghanistan. i will be ending that war by the end of 2014, but every time i go to walter reed and visit wounded troops and every time i sign a letter for c